Improvement in burglar-proof safes



tniued iatcfi @wat @Mita E. M. HENDRIOKS'O-,-OF BROOKLYN, NEW YORK.

Letters Patent No. 99,085, dated January 25, 1870.

IMPROVEMENT IN BURG-LAR-PROOIE SAIEES.

The Schedule referred to :in these Letters Patent and making part of thesame.

banks, insurance companies, and other institutions, as

well as private individuals, and fbrallpuI-poses for which safes areused, from heilig blown open by means of powder, nitro-glycerine, orother explosive material -or compound; and

The invention consists in forming pelforations orY apertures in andthrough some portions of the safe, for the escape of the gas generatedby such explosive material, without injuring the safe, as will behereinafter more fully described.

In the accompanying drawingv Figure l is a vertical section of a safe,on the line a: x ot' iig. 2.

Figure 2 is a horizontal section of the line y y of fig. 1.

Similar letters of reference indicate coiresponding parts.

In this example of my invention, I show the bottom of the safeperforated and prepared according to my invention; but I do not confinemyself to this particular arrangement, as the auxiliary plates may bemore or less in number, or bars or grating may be substituted therefor,and the arrangement may be made in some other part of the safe; but Iprefer the bottom, for obvious reasons.

A represent-s the walls of the safe. i B is the bottom.

O is the top.

D is the door.

The bottom, B, may be perforated with any desired number of holes, or itmay be made in any other manner, so that it shall allow the gas from anexplosive compound to escape through it.

E represents such apertures.

Above the bottom, and either in contact or separated from each other, Iplace one or more perforated plates F, with the perforations soarranged, in relation to each other and to the bottom, that theholesshall not register with each other, nor with the holes or perforations Ethrough the bottom. The object of this is to prevent the introduction ofa tool or` instrument from.

the bottom, in case the safe should be upset or tipped partly over.

It is evident that if powder or any other explosive vmaterial should inany manner beI introduced into the safe, and bc ignited, the gas wouldnot beconfined, but would escape through the bottom and do no injury tothe s afe.

A portion of the back, top, or any other part of the safe, may beprovided with apertures or perforations for the escape of explosive gasfor this purpose.

Having thus described my invention, Y

I claim as new, and desire to secure by Letters Patent- The constructionand arrangement of' the perforated plates, as described, whereby thegases from explosive substances may escape, substantially as set forth.

The above specification of my invention signed by me, this 15th day ofDecember, 1869.

E. M. HENDRICKSON.

Witnesses: Y

Gao. W. Maman, ALEX. F. ROBERTS.

